Cracking password protected PDF documents - Printable Version +- hashcat Forum (https://hashcat.net/forum) +-- Forum: Misc (https://hashcat.net/forum/forum-15.html) +--- Forum: User Contributions (https://hashcat.net/forum/forum-25.html) +--- Thread: Cracking password protected PDF documents (/thread-3818.html) |
Cracking password protected PDF documents - atom - 11-07-2014 We just started with the work on oclHashcat to support cracking of password protected PDF. There is 5-6 different versions but for PDF version 1.1 - 1.3, which uses RC4-40 (and we have a fast rc4 cracking kernel), we can already summarize:
Here's how the output looks like: Quote: RE: Cracking password protected PDF documents - KT819GM - 11-07-2014 Very good news for today, waiting for more details, as there are some documents waiting for 'recovery' RE: Cracking password protected PDF documents - Rolf - 11-07-2014 Hehe, awesome as usual, congratulations, Jens. So, this only applies to PDFs up to Acrobat v4. v5 and 6 implements 128 bit RC4, v7 128 bit AES and X and later 256 bit AES. RE: Cracking password protected PDF documents - Mem5 - 11-07-2014 Very good news ! :] RE: Cracking password protected PDF documents - madtyn - 11-16-2014 Hello, I'm a newbie and I'm interested in cracking a PDF file from many years ago, but I don't know how to run the oclHashcat for doing this. Seeing this example makes me understand that -w, -m and -a are options for specifying how to do it, but don't know how to specify the target file. Is the "?b?b?b?b?b" some kind of hash associated with the file? Should I run some hash command against the PDF file? Thanks in advance RE: Cracking password protected PDF documents - KT819GM - 11-16-2014 It's not implemented yet, so you just have to wait for that feature in next versions. RE: Cracking password protected PDF documents - Mem5 - 11-16-2014 As written, it will work with oclHashcat-1.32. RE: Cracking password protected PDF documents - smarter - 12-14-2014 glad to hear that! ____________________ Coque Samsung Galaxy A7 chargeur iPhone 6 Plus |